Every time you visit a website, your browser and the server exchange hidden bits of information called HTTP headers. These headers tell browsers how to display content, manage caching, enforce security policies, and more.
With the HTTP Header Checker on 99tools.in, you can easily inspect these headers for any URL. This tool helps developers, SEOs, and system admins debug issues, improve performance, and strengthen website security.
🧭 What Are HTTP Headers?
HTTP headers are metadata sent in HTTP requests and responses. They sit between the browser and server, carrying important instructions and details such as:
- Server type and version
- Content type (HTML, JSON, CSS, etc.)
- Caching rules (expires, cache-control)
- Redirect information (3xx responses)
- Security settings (HSTS, CSP, CORS)
For example, if you visit https://example.com, the server responds with headers like:
HTTP/1.1 200 OK
Content-Type: text/html; charset=UTF-8
Cache-Control: max-age=3600
Server: Apache
Strict-Transport-Security: max-age=31536000; includeSubDomains
🔍 Why Use an HTTP Header Checker?
Here’s why the tool is so useful:
- ✅ Debug server responses – Verify redirects, status codes, and caching rules.
- ✅ Check SEO signals – Ensure proper redirects (301 vs 302), canonical headers, and compression (Gzip/Brotli).
- ✅ Analyze security headers – Confirm HSTS, X-Frame-Options, and CSP are properly set.
- ✅ Test content delivery – Check if CDN headers (Cloudflare, AWS CloudFront, Akamai) are active.
- ✅ Detect server technology – See what server software (Apache, Nginx, IIS) and frameworks are in use.
🛠️ How to Use the HTTP Header Checker on 99tools.in
- Go to the HTTP Header Checker page on 99tools.in.
- Enter the URL you want to analyze (e.g.,
https://yourdomain.com). - Click Check Headers.
- Instantly view all HTTP response headers returned by the server.
You’ll see details like status codes, content type, server name, caching, cookies, and security headers in a clean, readable format.
🚨 Common Issues You Can Detect
The HTTP Header Checker can quickly help spot problems such as:
- ❌ Wrong redirect type (302 instead of 301 for SEO).
- ❌ Missing security headers (HSTS, CSP, X-XSS-Protection).
- ❌ No cache-control headers, leading to slow performance.
- ❌ Revealing too much server info (leaking Apache/Nginx versions).
- ❌ Incorrect MIME types (e.g., serving JSON as text/html).
🔧 Tips for Developers & SEOs
- Use 301 redirects for permanent moves to preserve SEO link juice.
- Add Strict-Transport-Security (HSTS) to force HTTPS.
- Enable Content-Encoding (Gzip/Brotli) to reduce file size and boost speed.
- Limit Server header exposure to prevent information leaks.
- Set Cache-Control wisely for static assets to improve site performance.
✅ Final Thoughts
The HTTP Header Checker is a must-have for anyone managing a website. By analyzing headers, you can:
- Improve SEO and performance,
- Strengthen website security,
- Ensure the right user experience.
👉 Try the free HTTP Header Checker now on 99tools.in to instantly view full server response headers for any URL.